Onan fuel consuption

[rbrand]

I have a Onan 4000 generator.
would anyone have an idea of it's fuel consumption. Hours/ Gal?

[Chum_lee]

See page 20 for fuel consumption specs.

http://www.joshwakefield.com/xplorer/onan-microquiet-4000.pdf

Oh what the heck, why not just read the entire manual while you're there!

Chum lee

[gswcgi]

Onans are very fuel efficient whether gas or diesel. I had an Allegro with a 4KW onan gas genny and now have an Onan 7,500KW diesel and they both oue less than a gallon an hour at full load.Kasr winter I ran the Onan diesel for 14 hours at half load and it took 10.5 gallons.

[eHoefler]

When we go to the races, the generator usually runs 12-16 hours a day, for the 2 days we're there, it usually consumes 11-12 gallons of gas.

[MrWizard]

charging batteries watching TV
fridge, WH etc om LP
approx 1/4 gal per hr

running the A/C approx 1/2 gal per hr

running the fridge and wh on electric using the genny is a big waste of gasoline fuel, especially in emg situation when you might need to stretch that fuel
set fridge and wh, LP only use the LP heater if needed
A/C well if needed that has to be the genny

[bounder39zman]

dont forget when you calculate run time, that gen will stop pulling fuel on gasoline models, somewhere around 1/4 tank on most rv's

[rbrand]

Thank you Mexicowanderer. That was quick. Right now it is parked in my backyard masquerading as an earthquake emergency kit. I wanted some idea of how many hours of power I could get with a full tank of gas. Now I know.

Thank you

[MEXICOWANDERER]

The range between a light load, say 750 watts and a heavy load, perhaps 3,200 watts is considerable.

Cut and paste - this is listed on Google


rv2go

Fulltime 14 yrs (Knoxville, TN).or someplace else

Senior Member

Joined: 12/26/2000

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Posted: 08/28/11 11:18am Link | Print | Notify Moderator
From Onan:
4,000 watts
33.3 amps
LP vapor generator is 3,600 watts with 30.0 amps
Gas generator consumes an average of .5 gallons of fuel per hour at half load.
LP vapor generator consumes an average of .6 gallons of fuel per hour at half load
3,600 RPM

[dmascheck]

I’d be interested as well. Yours works off of propane?